So I was working inside my newly-acquired Realistic SCR-6 boombox trying to fix the pause button problem, when I noticed the cassette belt looked pretty worn, so I yanked it out of there. Suspicions were correct; as soon as I put it back on, it began to slip off. I thought that the flat belt set I have may have the belt in it, but it does not. Thing is, it's a very large belt, and the kit only had up to FBS12.1 or so.
TurntableNeedles.com has all of the belt sizes, but my question is, should I go with the 14.7, 14.5, or the 14.1 size belt (to account for stretching over the years)? This will be my first time I've had to measure a belt myself, so I want to be correct.

TurntableNeedles.com has all of the belt sizes, but my question is, should I go with the 14.7, 14.5, or the 14.1 size belt (to account for stretching over the years)? This will be my first time I've had to measure a belt myself, so I want to be correct.
